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Migratory Birds
Wenn Vogelarten die Jahreszeiten an unterschiedlichen Orten verbringen, werden sie als Zugvögel bezeichnet. Mehrere Milliarden von ihnen sind jährlich unterwegs. Alljährlich machen sie sich von ihren Brutplätzen auf den Weg in ihr Winterquartier und zurück. Dabei fliegen manche Arten Tausende Kilometer. Sie überqueren Gebirge, Ozeane und Kontinente. Es ist eine Reise voller Hindernisse und Gefahren. Wie finden Zugvögel punktgenau ihr Ziel? Sie haben mehrere Möglichkeiten: Mit ihrem inneren Kompass können sie das Erdmagnetfeld wahrnehmen. Wie sie das genau machen, weiß man noch nicht. Sie können sich aber auch am Stand der Sonne, der Sterne und anhand der Landschaften orientieren. Den Sonnenstand erkennen sie selbst bei bedecktem Himmel, da sie UV-Licht wahrnehmen. Durch Meeresbrandung entstehen tiefe, für uns unhörbare sogenannte Infraschalltöne. Auch danach können sich einige Vogelarten orientieren. Gemeinsam mit dem umfangreichen Unterrichts- und Begleitmaterial auf dem Datenteil der DVD ist der mehrsprachige Unterrichtsfilm bestens für den Einsatz im Unterricht geeignet.
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Wadden Sea
Wadden Seas are parts of seas or landscapes on the coast respectively. Characteristic of these landscapes is that Wadden Seas are particularly exposed to the tides. There are many Wadden Seas in the temperate zones all over the world. The sea accessible by wading is usually flooded twice a day during high tide. The areas drying out at low tide are called mudflats. The habitat is susceptible to pollutions, in particular to those caused by man. We deal with the natural landscape between the Dutch Den Helder and the Ho Bay in Denmark that covers 10,000 square kilometres in total. The Wadden Sea along the North Sea: National Park, UNESCO World Heritage natural site and the largest contiguous area of mudflats in the world. The North Sea coast is wilderness on the one hand, work of man on the other hand.
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Groundwater
When we open the tap, it gushes out: drinking water – clear and clean. It is our most important victual and can be replaced by NOTHING. On average every inhabitant of Germany consumes 125 litres every day! But where does our drinking water come from?
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Cranes
They are counted among the most elegant and distinctive domestic birds. Due to their size, cranes can hardly be overlooked. Their call can be heard for miles. And: You hear them more and more often.
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Blood
One moment of distraction and the damage is done: Tim has slipped and has scraped his knee. The wound begins to bleed. Back home, Tim is comforted by his mother and a plaster is put on the knee. Actually, this is not necessary any more because Tim’s body has already started to help itself by forming a scab on the wound. A skin injury makes it possible for germs and dirt to enter the body. To prevent this from happening our organism repels all foreign substances, beginning at the same time to close the wound. This is done with the help of blood clotting, which starts directly when blood gets into contact with the outside world for example.
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Fish Farming
Lakes, rivers and streams are the natural habitats of our freshwater fish. Some of them, such as carp, trout and char, are eaten as food fish. But where do the fish come from and why have our lakes and rivers not been fished dry yet? Since the Stone Age people have been catching fish for subsistence. Fish is an important source of protein. With a wide variety of methods, such as fishing rods or nets, we hunt them successfully.
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Hunters and Hunted
The African night is not for sleeping. A lot is going on there. The hunters are lying in ambush and the preys are on alert. Predators are mammals. Scientifically they are called carnivores. But other predatory vertebrates such as cats, jackals, hyenas and crocodiles are colloquially termed »predators«. They feed on meat but are not very selective in doing so. As they are not specialised in one type of animal but eat all vertebrates as well as carrion, they are called opportunistic feeders, which means they target the food that is easiest for them to catch, in the shortest time and with minimum energy input.
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Organic Farm
That is how we imagine an ideal farm. Free-range hens, cows are being driven from the pasture into the stable, a cat is straying across the yard, the dog is watching over everything... This farm of farmer Ponzaun, however, exists today only because he need not subsist on the profit he makes from selling the products grown on his farm. The main income on the Ponzaun farm derives from the guests who want to experience once again what life was like on a farm in former times. During their holiday on the farm the children and the grown-ups want to participate in the daily life that is determined by the care for and life together with the animals and nature.
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New Species in our Environment
More and more animal and plant species successfully spread far away from their original homes. They are organisms that with our assistance – or even alone – are disseminated further and further across the globe: they are called invasive species.
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MedienLB has been producing award-winning school films and interactive modules for the classroom since 2006.
Infections
’Health isn’t everything but everything is nothing without health.‘ – This clever sentence comes from the German philosopher Arthur Schopenhauer. Since the introduction of antibiotics we are hardly aware of infectious diseases as a threat to our health anymore. However, how important successful prevention and therapy are is shown in the fact that in Germany alone about 50,000 deaths are caused by infectious diseases every year. Infections are the second most common cause of death worldwide. According to an estimate of the World Health Organisation more than 30% of deaths worldwide are related to infectious diseases. Most of them affect people in poorer countries and over 15 million people die of infections worldwide.
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Biotechnology I
Biotechnology is the application of science and technology to living organisms. Today, biotechnology plays an increasingly important role in everyday life. Very rarely, however, are we aware of it because you cannot tell the biotechnological origin of products of the medical, pharmaceutical and food industries by their look. For example, the enzymes needed for cheese production are formed by biotechnologically programmed mould fungi.
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Vaccination
It is only in recent years that a vaccination has existed that is supposed to lower the risk of getting cervical cancer. This vaccination can protect against specific, sexually transmitted human papillomaviruses that are considered one of the causes for cervical cancer.
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